T. Impelluso

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Flexible intramedullary nails are commonly used to treat femoral fractures in children. This study evaluated the biomechanical differences between stainless steel and titanium nails when securing transverse and comminuted fractures in a synthetic femur model. Retrograde flexible stainless steel and titanium nails placed in a divergent "C" pattern were(More)
Titanium flexible intramedullary nails have become far more prevalent for stabilization of pediatric femur fractures in recent years. While steel may be expected to have superior fracture stability due to its higher elastic modulus; titanium alloy has experimentally demonstrated improved biomechanical stability, as measured by gap closure and nail slippage.(More)
The time-dependent filtration pressure curves of cell suspensions pumped through 5 microns polycarbonate filters at a constant flow rate were analyzed with the aid of a theoretical model developed in an accompanying paper. The cell suspensions contained mixtures of erythrocytes and leukocytes, the concentrations of which were systematically varied. The(More)
A theory is developed for the flow of suspensions of blood cells through filters in which the properties of the cells are defined by statistical distributions. It is shown that conditions are generally transient, and computational procedures are developed to compute the pressure drop and the fraction of the pores of the filter containing cells of various(More)
A theoretical model of filtration of suspensions containing red blood cells (RBCs) and white blood cells (WBCs) has been developed. Equations are written for the pressure drop, the filtration flow and the fractions of filter pores containing RBCs (alpha) and WBCs (alpha*). Because the relative resistances (ratios of resistance of cell to resistance of(More)
1 San Diego State University, Department of Mechanical Engineering, San Diego, CA 92182-4512, impellus@kahuna.sdsu.edu 2 tmetoyer@cscmail.org, Tmmetoyer@aol.com Abstract -The Department of Mechanical Engineering at San Diego State University recently began to re-design its introductory mechanical engineering courses. The objectives of these newly designed(More)
The virtual stress testing machine (VSTM) project demonstrates the use of the cyber-infrastructure to integrate the algorithms of computational mechanics and supplement virtual environments with physics. The VSTM is not a tool, nor is it intended to be; rather it is a pedagogical presentation of new research paradigms that should be comprehensible to(More)
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